Effective Simulation of the Boundary Layer of an Entire Brake Pad

Ostermeyer, Georg‐Peter; Merlis, Joshua H.

doi:10.4271/2015-01-2664

Cited by 4 publications

(8 citation statements)

References 8 publications

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“…The Abstract Cellular Automaton assumes an ideal axial run-out; this effect is therefore not observed in the simulation results. The tribological behavior simulated using the Abstract Cellular Automaton was also validated against results from a classical grid-based automaton, which itself underwent rigorous validation testing [13].…”

Section: Resultsmentioning

confidence: 99%

“…To integrate the principles of N-body simulations and classic grid-based cellular automata, we introduce an automaton with generalized neighborhood properties, where each patch is one cell. The result is a simulation software that produces global results comparable to those attained using the classic grid-based cellular automata simulations [13]. Through its innovative structure and use of simplified algorithms, the Abstract Cellular Automaton implements the insights gained through the development and use of the classical grid-based cellular automata, while offering significant computational advantages compared to these predecessors and computing solutions of the entire pad-disc contact under realistic normal load distributions.…”

Section: Methodsmentioning

confidence: 99%

“…The Abstract Cellular Automaton was first documented in Ref. [13], where its functionality was validated based on comparison studies with the grid-based cellular automata. It is a simulation tool developed with the intention of modeling the dynamic signature of the coefficient of friction at the tribological interface of an automotive braking system based on the theories of patch dynamics.…”

Section: Methodsmentioning

confidence: 99%

“…"In-stop" braking procedures can also be simulated using the Abstract Cellular Automaton. Early simulations implement this under the assumption that all eight pad-disc interfaces of the automobile undergo identical conditions and exhibit identical responses [16].…”

Section: Methodsmentioning

confidence: 99%

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Modeling the Friction Boundary Layer of an Entire Brake Pad with an Abstract Cellular Automaton

Ostermeyer

Merlis

2018

Lubricants

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The principle energy exchange of a brake system occurs in the tribological boundary layer between the pad and the disc. The associated phenomena are primarily responsible for the dynamics of brake systems. The wear debris forms flat contact structures, or "patches," which carry the majority of the normal load in the system and are highly influential on the friction behavior of the system. A new simulation tool is presented, which is capable of rapidly performing simulations of the contact between an entire brake pad and disc. The "Abstract Cellular Automaton" simulations accurately model the patch coverage state of a brake pad surface based on the system's load history. This can be used to simulate the complex dissipation phenomena within the tribological contact of the entire pad, including time-dependent local friction coefficients, wear and wear debris transport, and vibrational effects on highly differing scales.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Modeling the Friction Boundary Layer of an Entire Brake Pad with an Abstract Cellular Automaton

Ostermeyer

Merlis

2018

Lubricants

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“…They have also developed dynamic models of the coefficient of friction, which are capable of accurately representing complex behavior using simple mathematics [1]. They have developed various cellular automata towards the precise computation of tribological effects in a realistic 3-D model of a friction material mixture, and also towards efficiently simulating the tribological contact between a full-scale brake pad and disc [2].…”

Section: Methodsmentioning

confidence: 99%

Multiphysics of Tribocontacts

Ostermeyer

Bräuer

Merlis

et al. 2017

Proc Appl Math and Mech

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The complex processes involved in the dry friction between two bodies are not yet fully understood. Towards an improved understanding of the associated tribological phenomena, the authors combine their skills and expertise in the respective fields of tribological experimentation, modeling, and simulation, as well as topological and chemical surface analyses. The aim of this research is more accurate predictions of the tribological behavior of minimal friction material mixtures. In order to improve the technical understanding of high-load tribological contacts (in which wear debris significantly influences the contact situation), a great volume and variety of research is necessary. The authors have devised a "vertically integrated" research approach towards addressing the myriad interdependent phenomena associated with such investigations. MethodsThe authors at the Institute of Dynamics and Vibrations have made several contributions towards the understanding of highload tribological contacts. For example, they have advanced the understanding of the influence of "patch dynamics" on the tribological behavior of high-load tribological contacts. They have also developed dynamic models of the coefficient of friction, which are capable of accurately representing complex behavior using simple mathematics [1]. They have developed various cellular automata towards the precise computation of tribological effects in a realistic 3-D model of a friction material mixture, and also towards efficiently simulating the tribological contact between a full-scale brake pad and disc [2].Multiple tribometers have been developed at the Institute of Dynamics and Vibrations which are capable of investigating high-load tribological contacts. These devices precisely measure the input and reaction forces very close to the tribological contact. Many other quantities are also measured, such as the temperatures of the two friction bodies, acoustic signals, and environmental conditions. An example of resulting friction and temperature measurements is shown in Figure 1. Furthermore, one of the tribometers is equipped with a built-in topography measurement station. Using this, quasi in situ photographs and measurements of the friction material's topography can be automatically made throughout the measurement procedure [3].The Institute of Surface Technology has performed various types of investigations into tribological systems, with a focus on surface technology and tribochemistry. They have developed methods for actively adjusting the friction and wear behavior of tribological contacts through the use of various coatings and thermal treatments, and analyzed the results based on the chemical composition of the associated surfaces [4]. By optimizing plasma nitriding treatments, they have improved the wear resistance of mechanical parts under tribological loads [5]. Recently, this institute has developed methods for optimizing chemical analyses of friction materials, particularly at the tribological boundary layer. As shown in Figure 2, this involv...

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Bio-Soluble Chemical Composition for Complementary Mineral Fibres: An Enhanced Tribologic Effect and Its Influence on Disc Wear

Razo¹,

Persoon²

2016

SAE Int. J. Mater. Manf.

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Effective Simulation of the Boundary Layer of an Entire Brake Pad

Cited by 4 publications

References 8 publications

Modeling the Friction Boundary Layer of an Entire Brake Pad with an Abstract Cellular Automaton

Modeling the Friction Boundary Layer of an Entire Brake Pad with an Abstract Cellular Automaton

Multiphysics of Tribocontacts

Bio-Soluble Chemical Composition for Complementary Mineral Fibres: An Enhanced Tribologic Effect and Its Influence on Disc Wear

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